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10 cards from this deck
Total number of different species in an area
Relative abundance of different species in an area
(quadrats with species / total quadrats) × 100%
Total organisms / total area sampled
For abundant species where counting individuals is impossible
Prevents bias in data collection
(S₁ × S₂) / number marked in S₂
D = 1 - Σ(n/N)²
High diversity (many species with similar abundances)
Abundant, Common, Frequent, Occasional, Rare
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